Men's Grayers Flannel Shirt Size M Button Down Long Sleeve Gray Heritage Flannel Excellent pre-owned condition without any visible flaws, stains, rips or pulled threads. No missing buttons. Men's Grayers Heritage Flannel. Long Sleeve, button up collared shirt. Size: Medium. Color: Gray and white speckled with dark gray contrasting buttons. Mid weight flannel, not lined. Comes from a smoke free home.